1994 E420 - How can you tell if wiring harness has been replaced? - PeachParts Mercedes-Benz Forum

JimF · #1 12-13-2007, 11:48 AM

Quote:

Originally Posted by 85MB300D

Will ALL 1990s W124s need to have this done? Or only certain years and models?

How can you tell if it has been replaced or not?

Thank you!

Check out the attached picture that shows an "easy" place to inspect the wiring harness. It's NOT the best place but is easily done and will give you an real-world check to see if the wires are bad or starting to go bad.

Remove the front facade by lifting up and locate the farthest sensor on the right.

If it's 'bad' there, then it is in worse condition at hotter places. It needs to be replaced.

emerydc8 · #2 12-13-2007, 08:17 PM

That sensor was the first place I noticed that the insulation on the wires was deteriorating. I think the insulation on the wires there is probably a fair and accurate representation of what you could expect for the rest of the wiring harness.

Pete Geither · #3 12-13-2007, 09:33 PM

Quote:

Originally Posted by JimF

Check out the attached picture that shows an "easy" place to inspect the wiring harness. It's NOT the best place but is easily down and will give you an real-world check to see if it's bad or starting to go bad.

Remove the front facade by lifting up and locate the farthest sensor on the right.

If it's 'bad' there, then is in worse condition at hotter places. It needs to be replaced.

Amen, and that should settle that.